package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增菜品和对应的口味数据
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            //向口味表插入n数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult PageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品的批量删除
     * @param ids
     * @return
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否能够删除--是否存在起售中的菜品
        ids.forEach(id->{
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //起售中不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });

        //判断菜品能否删除--是否存在关联套餐
        List<Long> setmealDishIds = setmealDishMapper.getSetmealDishIds(ids);
        if(setmealDishIds!=null && setmealDishIds.size()>0){
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //可以删除--删除菜品数据
        for (Long id : ids) {
            dishMapper.deletById(id);
            //删除菜品关联口味数据
            dishFlavorMapper.deletByDishId(id);
        }

    }

    /**
     * 根据id查询菜品和对应的口味信息
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id在口味表查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        //封装数据到VO对象

        DishVO dishVO = new DishVO();

        BeanUtils.copyProperties(dish,dishVO);

        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 根据菜品信息修改菜品和对应的口味信息
     * @param dishDTO
     */
    public void updeteWithFlavor(DishDTO dishDTO) {
        //修改菜品表信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.updete(dish);

        //修改口味表信息,先删除再插入
        //删除口味信息
        dishFlavorMapper.deletByDishId(dish.getId());

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors!=null && flavors.size()>0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());

            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return  dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 起售停售菜品
     * @param status
     * @param id
     * @return
     */
    @Transactional
    public void startOrStop(Integer status, Long id) {

        Dish dish =Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.updete(dish);

        if(status==StatusConstant.DISABLE){
            List<Long> setmealIdList=new ArrayList<>();

            setmealIdList=dishMapper.getSetmealIdsByDishIds(id);

            Setmeal setmeal = new Setmeal();

            if(setmealIdList!=null && setmealIdList.size()>0){
                setmealIdList.forEach(setmealId->{
                    setmeal.setId(setmealId);
                    setmeal.setStatus(StatusConstant.DISABLE);
                    setmealMapper.update(setmeal);
                });
            }

        }


    }

}
